Seiko Cal. 4421 - 590

The Seiko 4421-590 represents an important milestone in Seiko's 1977 lineup. With its 18mm lug width and 8.6mm profile, it sits comfortably on most wrists. [seikata-wm-a647e7b1d3f6]

Also known as: Monster

Specifications

Movement

Solar

Case Material

Two-Tone

Case Width

34mm

Case Thickness

8.6mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

180m

Dial Color

Black

Jewels

18j

Frequency

28,800 bph

Power Reserve

37 hours

Year

1977

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